Press for making workpieces tapering in longitudinal direction



Dec. 19, 1944. MANK-EN A 2,365,482

PRESSES FOR MAKING WORKPIECES TAPERING IN LONGITUDINAL DIRECTIdN Filed June 25, 1940 3 Sheets-Sheet 1 Inventors WI! #52 M MAN/(EN, O 770 0/74 MfilV/V,

By QQQtQQ Dec. 19, 1944. w. MANKEN ETAL 2,365,482

PRESSES FOR MAKING WORKPIECES TAPERING IN LONGITUDINAL DIRECTION Filed June 25, 1940 3 Sheets-Sheet 2 Fig 5 flFORIVtYS 1 3 Sheets-Sheet 5 Dec. 19, 1944. w. MANKEN ETAL- PRESSES FOR MAKING WORKPIEGES TAPERING IN LONGITUDINAL DIRECTION Filed June 25, 1940 w N WMNN Nu m .Q 8 3 M 7 Can 'm NKM WM s 0 1 x mm M 8%. Q. \\\||)\(/..(|\L 8 M mm G @b 0 Nb I Hrromvrx Yak Patented Dec, 1944 ranss' FOR MAKING wonx rmcns' 'rarnnme IN nonemrmmn nmac'rron Wilhelm Manken and Otto vested in the Alien Property Berlin, Germany; Custodian Uhlmann, Waren, near Application'June 25, 1940, Serial No. 342,460

InG

ermany November 15, 1938 in Claims. (01.18-12) This invention relates to presses and more particularly to so-called extrusion presses serving for the production of work-pieces such as I- beams, T-bars andthe like having;v a, profile tapering in the longitudinaldirection of pressing.

It is known to produce work-pieces having a profile tapering in longitudinal direction by means of presses of the aforementioned kind including v conical mandrils'connected with the press-plunger, said mandrils moving during the operation of pressing througha fixed die of uniform crosssection; Although with known processe of this kind there may be produced work-pieces having angular profiles with the parts thereof varying both in thickness as well as in length, it is not possible to makework-pieces of aT, I, U or simi-.

lar profile of varyinglength in addition to varying thickness of the web and of the flanges of the profile.

Our present invention has for its general object to devise a press for producing work-pieces having profiles varying to a far greater-extent than had been possible to produce with presses of known construction. I

According to our invention we propose to use for this purpose a die composed of a plurality oi \parts which are caused to move apart during operation of the press.- Preferably this motion of the parts of the die is effected by action of the operating pressure. Moreover, the interior surr, faces of the movable parts of the die may conically enlarge towards the press-plunger, thus. facilitatthe production of the final to the work-piece.

In case portions of the profile produced by profile to be imparted means of said additional fixed die shall likewise be of a conformation tapering in longitudinal direction, it will be necessary to provide a two-part construction also for this fixed die and to mount the two parts of the latter movably with respect to each other.

Preferably the organs serving to impart motion to the movable die parts are constructed in such I .a manner that one-or several pairs of movable die-parts co-operat'e at their outer ends, that is at the ends away from the hole in the die, with fitting members provided with curve-shaped recesses. These fitting members are mounted within a wheel rim having'an internal gear and may be rotated with said wheel-rim bymeans of a spindle, the rotation being efl'ected to such an extent that the movable die-parts will slide in said recesses, wherebythe hole in the die will be enlarged in conformity with the shape of the curve of said recesses during the operation of the press,

with the result that a lengthwise tapering profile is imparted to the work-piece in longitudinal direction of pressing thereof. v y

In the accompanying drawings which form part of this specification we have represented some examples of construction of our'new press. In the drawings, Fig. 1, is a section through the dies of a construction producing awork-piece with an I-proflle in longitudinal direction, Fig. 2 a view ing the motion of said parts away from each other by action of the operating pressure. However,

said movable parts of the die may also be actuated by means of suitable operating organs.

The movable parts of the die are provided on of the die with movable parts, .as seen in the dii rection of pressing, Fig. 2A is a sectional -view takenalong line ZA-ZA in Fig. ,1, Fig. 2B is a perspective view of an'I-beam section made with.

, the apparatus shown in Figs. 1 and 2, Fig. 3 a

the outer side thereof with wedge-shaped surfaces which on their part co-operate with wedge-mem- .bers of suitable conformation. These wedgemembers are adapted to move in dependence from the velocity of the pressing motion, that is the speed of the press, for instance by means of spindles.

The actuating organs for said wedge-members may be driven and properly controlled in suitable manner either by the profile of the work-piece during being discharged from the press or also by the press-plunger. v g

V In some cases it will be necessary to further provide inthe rear of the movable parts of the aforesaid die an additional fixed die in order to mark thegap between said movable parts when the parts have moved apart. during operation of the press, to such an extent as not to serve for section through the dies constructed to produce a. work-piece with a T-profile in longitudinal direction, Fig. 4 a view of the movable die, as seen inthe direction of pressing, Fig. 4A is a sectional view taken along line lA-JA in Fig. 3, Fig. iB- is a perspective view of a T-bar section made with the apparatus shown in Figs. 3 and 4, Fig. 5 a plan-view of a further construction of the die, as seen in the direction of pressing, and Fig. 6 a section along line VI--VI of Fig. 5, Fig. .6A is a perspective view of a pyramidal bar made with the apparatus shown in Figs. 5 and 6. Fig. 7 is a schematic view wherein "the die operating means is controlled by the pressurein the press, Fig. 8 is a similar view wherein the die operating means is controlled by the motion of the press, and Fig. 9 is another vie wherein the die operating means is controlled by the motion-of the work-piece.

- are movable transversely to the direction ofpressing are designated by the numerals 2 and 3. The

rigidly mounted in immovable holder Id, and is therebeyond.

' plunger is designated by 53, while l2, l3 and II the work-piece 52, while being discharged from pinion 24 on a spindle 25 is in-mesh with the Referring more particularly to 'the drawings,'

irr-Flgs. '1 and 2 the receptacle for the materlal'to be worked in the press is designated by the reference numeral I, while the parts of the die which parts 2 and 3 of the die are bf wedge shaped'c'onformation on their outer-surface, ar indicated in Fig; 1 at l and 5, in order taco-operate with wedges 6 and lo! a conformation corresponding to that of'said outer surfaces of said die-parts. The die partsi, 3 and the wedge members 6, I are mounted in the immovable holder la. The wedges 8 and 1 may be actuated by means of suitable operating organs, such as for instance spindles-8 as shown in Fig. 1. Motion of the die-parts 2 and 3 in direction away from, each other is facilitated by the fact that their interior surfaces 9 and I are of a divergent conformation, enlarging in direction towards the press-plunger. The spindles 8 actuating the wedges 3 and I are pref--- erably driven and controlled by the profile of the work-piece 80 where' it is being discharged from the press or also by the motion of the pressplunger I3.

The pressure exerted onto the spindles 8 by way of the wedges 8 and I may be varied by properly altering the inclination of the wedge-shaped outer surfaces of the die-parts 2 and .3. In order to insur proper working of the press, care should be, taken that no excessive pressures are exerted onto the spindles 3. In the rear of the die-parts 2'and 3 there is further provided the aforementioned additional fixed die which masks part of the gap between the die-parts. Fixed die II is dimensioned to provide the final maximum size of the work after dies --2, 3 have moved apart The press shown inFigs. 3 and 4 serving for the production of a work-piece 5| with a T- proflle is constructed similarly .to the press shown in Figs. 1 and 2. In Figs. 3 and 4 the receptacle for the material to be worked by the'press is des gnated by the reference numeral I, the press are die-parts mounted movably in transverse direction to the d rection of pressing.

The outer surfaces iii of the parts I2, l3 and H are likewise wedge-shaped in order to cooperate with the-wedges I6 actuated by the spindies ll. In the rear of the die-parts l2, l3 and it, there is again used nxed dies l8, led and lb rigidly mounted in immovable holder la for masking part of the gap between the movable die-parts for the above-stated purpose. In the construction of-the press shown-in Figs. 5 and 6 the movable die-parts l3. form at their inner ends 20 the hole in the die. By action of the press the die-parts l3, will be pressed at their outer ends against fitting members 22 mounted with n a wheel-rim 23 with. an internal gear. A

teeth of said internal gear. The wheel-rim 2s may be rotated by means of the spindle 25 effected and controlled by the motion or the press plunger 53,- or in some other suitable way.

Fig. 7 is a schematic view'of a die press assembly wherein the die operating means 3 are controlled by the pressure within chamber 33a.

'ders 56 by wayofpipe 65 to thereby actuate the members which control ing means 3 to control the size of the die opening. The pressure exerted upon the material the size of the dieopening. L

Fig. 8 is a similar schematic view but, in-this instance, the die 'operating-gmeans is controlled by the motion of the press. The mechanism for performing this function comprises'any suitable means suchas a rack 59, one end of which is secured to the piston 53 and the other end of observing Fig. 8 that movement to the left of I piston 53 will produce a proportional movement to the right of the rods l'l, resulting in the parts 3 moving toward each other. In other words,

. the farther piston 53 moves to the left, the smaller in size will be the die opening.

Fig. 9 shows still another form of the invention 7 wherein the die operating means are controlled a which meshes with a rackil and this rack is It is thus seen that the ,movement of the work-piece 50 to the left will secured to the rods ll.

produce a proportional movement to the right of the rods I! to correspondingly actuate the members 3 which control the size of the die opening.

We claim: v

1. In apress for making a work-piece tapered in the direction of pressing, a die comprising a plurality of relatively movable die parts, adjustable abutment means for engaging said die parts selectively to hold said die parts in any one of a plurality of relative positions, operating means for adiusting said adjustable abutment means whereby to allow the workpiece to move said movable die parts.

' 2. The combination claimed in claim 1, said operating means being controlled by the operating pressure of the press.

3. The combination claimed in claim 1, said movable die parts and said abutment mean having cooperating wedge-shaped working surfaces. 4. The combination claimed in claim 1, said die parts and said abutment means having cooperating wedge-shaped surfaces, said operating means being responsive to the motion of the Press.

5. The combination claimed in claim 1, said die parts and said abutment means having cooperating wedge-shaped working surfaces, said operating means being controlled by the motion of the work-piece during discharge of the workpiece from the press.

6. The combination claimed in claim 1, said press including a press plunger, said die parts and said abutment means having cooperating wedgeshaped surfaces, said operating means being controlled by the motion of the press plunger.

7. In a press for making a work-piece tapered in the direction of pressing, a die comprising a plurality of movable parts, adjustable means holding said die parts selectively'in any one of a plurality of relative positions, a press plunger for pressing th work-piece through said die parts in one direction, the inner surfaces of said die parts being tapered in the driving direction of said press plunger, and a fixed die mounted in the rear of said movable die parts whereby to mask a portion of the gap between said die parts after said die parts havemoved apart a predetermined distanoe.

8. The combination claimed in claim 1, said nular member for engaging, respectively, the

movable die, parts, means mounting said annular member for rotation, and a ring gear element on said annular means, said operating means including a spindle and a pinion on said spindle engaging said ring gear element whereby, when said spindle is rotated, the cam elements are moved across the cooperating surfaces on said movable die parts.

. WILHELM MANKEN.

O'I'IO UHLMANN. 

